Tag: Skeletal muscle pump

Unlike the blood circulatory system, the lymphatic system lacks a central pump like the heart. This unique aspect means that multiple fascinating mechanisms must work in concert to propel lymph throughout the body's vast network, a process essential for immunity and fluid balance.

According to medical experts, standing for prolonged periods with your knees locked can interrupt normal blood flow, causing blood to pool in the legs. This phenomenon, known as orthostatic syncope, explains **why do locking knees lead to fainting** and is a common issue for people in military formations, concerts, or long speeches.

Approximately 70% of the body's blood volume is in the venous system, making the skeletal muscle pump a critical accessory mechanism for aiding the heart in circulation. This powerful process, essential for general health, supports venous return, especially in the extremities, and prevents blood from pooling against gravity.